Alert archive / Nebraska / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 162, NWS Omaha, NE

June 21, 2007Cedar County, Pierce County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 21, 2007, 10:36 PM CDT for Cedar County, Pierce County, Nebraska. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 21, 2007, 10:36 PM CDT (03:36 UTC)
Expired: Jun 21, 2007, 11:15 PM CDT
In force: 39 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

Counties Cedar County, NE, Pierce County, NE

The radar

The Sioux Falls radar (KFSD), 141 km from the middle of the area, began a volume at 03:39 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 3.6 hours before the alert went out and 285 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1036 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 1463 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Omaha, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 21, 3:53 PM CDT, 6 hours 43 minutes earlier.

Area forecast discussion, Jun 21, 3:53 PM CDT, 6 hours 43 minutes before

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Hazardous weather outlook, Jun 21, 5:39 PM CDT, 4 hours 57 minutes before

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The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 22, 4:25 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Seward	35 min
Jun 22, 4:35 PM CDT	Severe Thunderstorm Warning	OAX	Saunders	40 min
Jun 22, 4:54 PM CDT	Severe Thunderstorm Warning	OAX	Seward	36 min
Jun 22, 6:37 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Seward	38 min
Jun 22, 4:45 PM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie, Shelby	45 min
Jun 22, 5:38 PM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie	52 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2007 Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.